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Weight regulator for a chairWeight regulator for a chair description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070090671, Weight regulator for a chair. Brief Patent Description - Full Patent Description - Patent Application Claims
[0001] The invention relates to a method of regulating the weight of a chair comprising a base frame to support a seat face as well as a spring system having adjustment means for adjusting the resilience of a weight regulator in dependence on the user's weight. [0002] The invention also relates to a weight regulator for a chair comprising a base frame to support a seat face as well as a spring system having adjustment means for adjusting the resilience of the weight regulator in dependence on the user's weight. PRIOR ART [0003] In connection with sedentary work environments, e.g. office environments, involving frequent changes between various working postures, it is known to produce chairs comprising a weight regulator which causes the seat and the backrest to follow the user's movements in relation to the given working posture by virtue of the user's weight. [0004] Such a chair is known e.g. from U.S. Pat. No. 5,397,165, where the weight regulator comprises a spring system which permits the user to tighten or relax the spring tension by means of a screw device and thereby to adjust the tilt function of the weight regulator, that is the resilience of the chair to the user's weight. [0005] However, the weight regulator and thereby the resilience of the chair cannot be adjusted in relation to the user's weight. Hereby, a very light person will not have the same benefit from the weight regulator of the chair as a heavier person, just as it is not possible to satisfy the individual ergonomic wishes which the user might have in respect of a such a weight regulating chair. [0006] Further, it is known from DE 4 231 057 to have a form of forced control between the inclination of the seat and the position of the backrest, where the inclination of the seat depends on the users weight. When, thus, the user leans forwards on the chair, the weight of the user will be concentrated on the front part of the seat and will cause the seat face to tilt from a neutral position (horizontal) and forwards, while the plane of contact of the backrest relative to the user moves closer to the vertical axis of rotation of the chair. Correspondingly, when the user leans back in the chair and thereby applies a pressure to the backrest, the seat will be tilted back. The resistance of the screw device increases in proportion to the tension of the spring, which frequently means that the user has to get up from the chair when the spring is to be tightened. Therefore, the user must alternatively sit and stand until the resilience of the chair correct for the user has been set, which is time-consuming per se. [0007] A serious drawback of the weight regulation in both U.S. Pat. No. 5,397,165 and in DE 4 231 057 is that the regulating principle is operated by a screw device, where the user often has to screw so long that this creates doubts of the effect of the function which the user wishes to affect. Therefore, the result is frequently that the user refrains from using the adjustment option, and, consequently, the ergonomic advantages which the product has been manufactured to offer, are not utilized. Thereby, the user has no optimum use and optimum comfort of the chair, just as the intended support for minimum loading of the body in a sitting posture is not achieved. The Novel Art [0008] The invention is intended to provide a weight regulator where the user's weight on the backrest of the chair means that the resilience individually satisfies the user's ergonomic wishes irrespective of the user's weight and various working postures. [0009] The weight regulator will thus be instrumental in allowing the chair to be adjusted easily and without the use of tools, whereby the user will be motivated to adjust the chair correctly. Thus, in case of various users, the maximum comfort of the chair can be utilized each time. [0010] This is achieved according to the method in that the resilience of the chair is adjusted by unloaded adjustment means, and that the adjustment is performed by moving one or more of the adjustment means at a time along a portion of the circumference of the base frame. [0011] The adjustment described in claim 2 ensures that the resilience of the weight regulator may be adjusted very accurately in a simple and easy manner, such that it is adapted to the instantaneous user who uses the chair. [0012] This is possible with a chair according to the invention in that the weight regulator comprises primary adjustment means for a coarse adjustment and secondary adjustment means for a fine adjustment of the resilience of the backrest and partially the seat by tilting/movement, said adjustment means operating between a lower bearing point and a base frame, and that the adjustment means are unloaded at the moment of adjustment. [0013] Claims 3 to 5 provide an easy way of performing a very accurate adjustment of the resilience of the weight regulator according to the user who is to use the chair. [0014] The invention, as described in claims 6 to 8, provides a releasable retention of the end part of the adjustment means in a given position relative to the base frame, so that the position suitable for the user may be maintained. [0015] Claim 9 describes means of adjusting the sitting length of the seat, which is important inter alia for the support of the user's thighs. [0016] Claim 10 describes an embodiment of the base frame with the option of arranging a backrest which moves together with the base frame. [0017] The invention will be described more fully below with reference to the drawing, in which [0018] FIG. 1 shows a weight regulator according to the invention for a chair, seen in perspective, [0019] FIG. 2 shows the weight regulator shown in FIG. 1, seen from above, [0020] FIG. 3 shows the weight regulator shown in FIG. 1, seen in a position from behind, and [0021] FIG. 4 shows the weight regulator shown in FIG. 1, seen from the side. EXEMPLARY EMBODIMENT Continue reading about Weight regulator for a chair... Full patent description for Weight regulator for a chair Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Weight regulator for a chair patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Weight regulator for a chair or other areas of interest. ### Previous Patent Application: Powered remote release actuator for a seat assembly Next Patent Application: Motion support apparatus Industry Class: Chairs and seats ### FreshPatents.com Support Thank you for viewing the Weight regulator for a chair patent info. IP-related news and info Results in 0.18038 seconds Other interesting Feshpatents.com categories: Accenture , Agouron Pharmaceuticals , Amgen , AT&T , Bausch & Lomb , Callaway Golf 174 |
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